Friday, June 29, 2012

1206.6616 (Nirbhay K. Behera et al.)

Constituent Quarks and Multi-strange Baryon Production in Heavy-Ion
Collisions
   [PDF]

Nirbhay K. Behera, Raghunath Sahoo, Basanta K. Nandi
In the frame work of the nuclear overlap model, we estimate the number of nucleon and quark participants in proton-proton, proton-nucleus and nucleus-nucleus collisions. We observe the nucleon normalized yield of multi-strange particles which show a linear rise with centrality, turns out to be a centrality independent scaling behavior when normalized to number of constituent quarks participating in the collision. This geometrical scaling indicates the partonic degrees of freedom playing important role in the production of multi-strange particles. Furthermore, we observe the constituent quark normalized yield when normalized to the strangeness content, it shows a strangeness independent scaling behavior. We give a comparison of data with HIJING, AMPT and UrQMD models to understand the particle production dynamics.
View original: http://arxiv.org/abs/1206.6616

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